#include <stdio.h>

int main(void)
{
	//希望统计总成绩和平均分
	int a1=80;
	int a2=90;
	int a3=78;
	int sum=a1+a2+a3;
	double avgScore=(double)sum/3;
	printf("sum:%d,avgScore:%.2f\n",sum,avgScore);
	int age=18;
	double score=97.5;
	int num=10;
	char word='a';
	age=age+1;
	printf("age=%d\n",age);
}
